Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:38:42 2013

Optimize a model with 37942 rows, 37332 columns and 148962 nonzeros
Presolve removed 61 rows and 0 columns
Presolve time: 0.16s
Presolved: 37881 rows, 37332 columns, 148901 nonzeros
Variable types: 37271 continuous, 61 integer (61 binary)

Root relaxation: objective 5.148859e+04, 4100 iterations, 2.00 seconds

    Nodes    |    Current Node    |     Objective Bounds      |     Work
 Expl Unexpl |  Obj  Depth IntInf | Incumbent    BestBd   Gap | It/Node Time

     0     0 51488.5897    0   54          - 51488.5897     -      -    2s
H    0     0                    75443.000000 51488.5897  31.8%     -    3s
     0     0 62131.1446    0    9 75443.0000 62131.1446  17.6%     -    7s
H    0     0                    71475.175346 62131.1446  13.1%     -    7s
H    0     0                    66858.000000 62131.1446  7.07%     -    8s
     0     0 63041.6626    0    2 66858.0000 63041.6626  5.71%     -    8s
H    0     0                    65130.720674 63041.6626  3.21%     -    8s
H    0     0                    64176.000000 63041.6626  1.77%     -    8s
H    0     0                    63051.000000 63041.6626  0.01%     -    8s
     0     0 63042.9375    0    1 63051.0000 63042.9375  0.01%     -    8s
     0     0 63047.5333    0    1 63051.0000 63047.5333  0.01%     -    9s

Cutting planes:
  Implied bound: 58

Explored 0 nodes (8575 simplex iterations) in 9.05 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 6.305100000000e+04, best bound 6.304753333333e+04, gap 0.0055%